I think that it should get on one of two (or on the two) version(s) the option to carry some AP weapons instead of claymore.
AP Weapons that I think of per faction :
For early Russia (late too if wanted), MEC, most insurgent factions (Chechnya, ARF, Militia, Insurgents, Taliban...) and China as PF97 :
The RPO-A Shmel (???-? ?????), a thermobaric rocket launcher that could be implemented in terms of damage as a way stronger tank shell (it's worth 5.5kg of TNT equivalent).
For late Russia, the RShG-1 could be used instead, which is stronger (at 8kg of TNT) and may probably be too powerful.
For the USA (and NATO as there are not that many weapons of that kind for NATO countries) :
The Mk 153 SMAW, using the SMAW-NE projectile, a thermobaric rocket that is a tiny little bit less strong that the RPO-A's one. It can be equipped with an ACOG scope or be used with irronsights.
Those weapons would be implemented with one or two shots per kit (up to the team's choice) and if the NATO one is made weaker, it could carry one more round the the Soviet/Russian one (or three for the SMAW, two for the RPO-A and one for the RShG-1 if it gets implemented too)
I think this rework could bring something really new to infantry combat and add a lot to the gameplay, making infantry pushes easier (and defense too), by adding a new dynamic factor to the firefights, and by making infantry a bit less reliant on assets for "BIG BOOMS".
Thanks for reading, and excuse me for my not-that-great English (I'm French)
Some videos for added information :
https://www.youtube.com/watch?v=AV3l_6tXb6Y[/youtube]
https://www.youtube.com/watch?v=4_Vtir6Vl4U[/youtube]
https://www.youtube.com/watch?v=bwf1B1iMZn4[/youtube]
https://www.youtube.com/watch?v=TnbCsIfIQYw[/youtube]